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Browse Prior Art Database

Retry Success Sector Read Verification in Idle Mode

IP.com Disclosure Number: IPCOM000117094D
Original Publication Date: 1995-Dec-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Asano, H: AUTHOR [+4]

Abstract

Disclosed is a method of intelligent sector reassignment of Hard Disk Drive, which is effective to data recovery from media problem that will grow in short period.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Retry Success Sector Read Verification in Idle Mode

      Disclosed is a method of intelligent sector reassignment of
Hard Disk Drive, which is effective to data recovery from media
problem that will grow in short period.

The algorithm of this method is as follows:
  1.  When the drive detects error during READ or WRITE command
       execution, it performs error recovery procedure which is
       programmed in the drive firmware.
  2.  If the error is recovered in a few retries, the firmware
       registers the recovered sector address into temporary storage.
  3.  The drive completes the READ or WRITE command with good status.
  4.  When the drive goes to Idle state, the firmware performs VERIFY
       operation on the registered sector and its adjacent sectors
       without host intervention.
  5.  The firmware checks the error rate of each sector and if it
       exceeds pre-defined level, the firmware performs
       auto-reassignment of the sector.